Examples of ptolemy.kernel.util.NamedObj.attributeChanged()

ptolemy.kernel.util.NamedObj.attributeChanged()
React to a change in an attribute. This method is called by a contained attribute when its value changes. In this base class, the method does nothing. In derived classes, this method may throw an exception, indicating that the new attribute value is invalid. It is up to the caller to restore the attribute to a valid value if an exception is thrown. @param attribute The attribute that changed. @exception IllegalActionException If the change is not acceptableto this container (not thrown in this base class).

     */
    public Collection validate() throws IllegalActionException {
        NamedObj container = getContainer();


        if (container != null) {
            container.attributeChanged(this);
        }
        return null;
    }


    ///////////////////////////////////////////////////////////////////

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        // if (!_isLazy && !neededEvaluation) {
        if (!_isLazy) {
            NamedObj container = getContainer();


            if (container != null) {
                container.attributeChanged(this);
            }
        }


        // The propagate call has evaluated all the value
        // listeners that are instances of Variable,

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                if (!oldVarType.equals(_varType)
                        && (oldVarType != BaseType.UNKNOWN)) {
                    container.attributeTypeChanged(this);
                }


                container.attributeChanged(this);
            }


            _notifyValueListeners();
        } catch (IllegalActionException ex) {
            // reverse the changes

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        _value = uri;


        NamedObj container = getContainer();


        if (container != null) {
            container.attributeChanged(this);
        }
    }


    /** Set the value of the URI by specifying a URL,
     *  and call the attributeChanged() method of the container.

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        }


        NamedObj container = getContainer();


        if (container != null) {
            container.attributeChanged(this);
        }
    }


    ///////////////////////////////////////////////////////////////////
    ////                         private variables                 ////

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